Keith Black 11-2241 1000cc Piston Set (.010 Oversize) for Harley XL

Upgrade your Harley-Davidson XL 1000cc engine with the Keith Black 11-2241 piston set, designed for a 3.188-inch bore and.010 oversize to deliver a 9:1 compression ratio for improved power and efficiency.

Crafted from a hypereutectic alloy and cast in a permanent steel mold, these pistons are lightweight for increased power output while maintaining durability and longevity. The low heat transfer characteristics help keep the skirts cooler, reducing piston expansion and wear over time, and the design supports high ring placement to enhance power and sealing while reducing detonation risk.

• Compatibility: Harley Davidson XL models from 1972 through 1981
• Oversize:.010 over, fits 3.188-inch bore
• Compression: 9:1 for a balance of power and efficiency
• Material/process: hypereutectic alloy, cast in a permanent steel mold
• Includes installation accessories: Ring-O-Matic Ring Compressor Tool Kit, Connecting Rod Clamping Tool, 1000cc Piston Set.020 Oversize

Break-in guidance: run the engine at moderate speeds for at least 500 miles to ensure proper piston and ring seating. Made in the USA, this piston set aims to restore or enhance vintage XL performance with lasting reliability.

Keith Black piston set is.010 oversize with a 8.2 compression ratio for 1972-1985 XL 1000cc models.

Upgrade your Harley Davidson XL engine with the Keith Black 11-2241 1000cc Piston Set, featuring a hypereutectic alloy designed for superior performance and durability. Crafted from cast in a permanent steel mold, these pistons are engineered to be lightweight, enabling increased power output and improved fuel efficiency while extending engine lifespan. The pistons are designed with a.010 oversize to fit engines with a 3.188-inch bore, and they feature a 9:1 compression ratio to optimize power and efficiency. The low heat transfer characteristics of the alloy help keep the skirts cooler, minimizing piston expansion and reducing wear over time. Consequently, this design allows for high compression ring placement that enhances power output and fuel economy while reducing the risk of detonation and increasing top ring temperature for better sealing. Proper break-in is essential; run the engine at moderate speeds for at least 500 miles, avoiding excessive low gear operation to ensure optimal piston and ring seating. For installation guidance, refer to the official instructions available at this link. This piston set is compatible with Harley Davidson XL models from 1972 through 1981, making it a reliable choice for restoring or enhancing vintage engines. Included in your purchase are accessory items like a ring compressor kit and connecting rod clamping tools to facilitate proper installation. Enhance your Harley’s performance with this high-quality piston set crafted in the USA for lasting performance and reliability.

Features:

• Hypereutectic alloy construction for durability and performance

• Cast in a permanent steel mold for precision and strength

• Lightweight design improves power and fuel efficiency

• .010 oversize to fit 3.188-inch bore engines

• 9:1 compression ratio for optimal power output

• Low heat transfer alloy reduces piston expansion and wear

• High ring placement enhances power and reduces detonation

• Includes accessory items for installation: Ring-O-Matic Ring Compressor Tool Kit, Connecting Rod Clamping Tool, 1000cc Piston Set.020 Oversize

Fitment:
Harley Davidson XL 1972
Harley Davidson XL 1973
Harley Davidson XL 1974
Harley Davidson XL 1975
Harley Davidson XL 1976
Harley Davidson XL 1977
Harley Davidson XL 1978
Harley Davidson XL 1979
Harley Davidson XL 1980
Harley Davidson XL 1981
Harley Davidson XL 1982
Harley Davidson XL 1983
Harley Davidson XL 1984
Harley Davidson XL 1985